Hi, On 08/31/2016 06:17 PM, Oliver Neukum wrote: > On Mon, 2016-08-29 at 13:26 +0800, Lu Baolu wrote: >> --- a/Documentation/kernel-parameters.txt >> +++ b/Documentation/kernel-parameters.txt >> @@ -1128,6 +1128,7 @@ bytes respectively. Such letter suffixes can >> also be entirely omitted. >> earlyprintk=ttySn[,baudrate] >> earlyprintk=dbgp[debugController#] >> earlyprintk=pciserial,bus:device.function[,baudrate] >> + earlyprintk=xdbc[xhciController#] >> > How is that defined? Should there be a PCI address? > > Regards > Oliver It is the same as EHCI debug port (earlyprintk=dbgp[debugController#]). When users have multiple xHCI hosts in their systems, they can specify which host they'd like to use for debug purpose. This has been documented in the usage guide (patch 0004). Best regards, Lu Baolu -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
